Gearing for turret-lathes.



No. 728,179. v PATENTED MAY 12, 1903. G. E. SEARCH & E. CHESHIRE.GEARING FOR TURR'ET LATHES.

- APPLICATION FILED F EB.1| 1902.

H0 MODEL.

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KM wayw- Wm I M w W UNITED STATES Patented May 12, 1903.

PATE T. OFFICE.

CHARLES E. SEARCH AND EDWARD CHESHIRE, OF MILWAUKEE, WISCON: SIN,ASSIGNORS TO MILWAUKEE MACHINE COMPANY, OF MILWAUKEE, WISCONSIN, ACORPORATION OF WISCONSIN.

GEARING FOR TURRET-LATH ES.

SPECIFICATION forming part of Letters Patent No. 728,1 '79, dated May12, 1903.

Original application filed September 3. 1901, Serial No. 74,080. Dividedand this application filed February 1, 1902. Serial N0.92.14'7. (Nomodel.)

and EDWARD CHESHIRE,citizens of the United States, residing. atMilwaukee, in the county of Milwaukee and State of Wisconsin, have 3invented a certain new and useful Improvement in Gearing forTurret-Lathes, of which the following is a full, clear, and exactdescription, reference being had to the accomio panying drawing.

The invention relates to speed-gearing adapted for use particularly inturret-lathes and screw-machines and other machines of analogouscharacter.

[5 The object of the invention is to provide novel mechanism by whichvarious operative connections may be quickly made between adriving-shaft and one or more driven shafts, which in turn drive otherparts of the mazo chinery, whereby said driven shafts may beindependently rotated at any of several rates.

The invention consists in the construction and combination of partshereinafter described, and pointed out definitely inthe claims.

The drawing shows a figure in vertical section of the mechanismembodying the invention.

As shown, the invention forms a part of a 0 turret-lathe, thelive-spindle of which is indicated by 1.

50 represents the shaft, which the invention is designed to rotate atsuitable speeds compared with the speed of some other ro- 3 5 tatingmember of the machine-in the present case the spindle 1. This shaft 50may be operatively connected by any suitable mechanism with the carriageand the turret-slide of the lathe as shown,for example, in our appli- 0cation forapatent on aturret-lathe,Serial No. 74,080, filed September 3,1901, of which appli cation this application is a division-or this shaft50 may have any other function and may be suitably connected with anymechanism which it is desired shall be driven by it. The power forrotating this feed-shaft comes from the speed-gear driving-shaft 60,which in the construction shown is driven by the spindle 1 through thegear 11, fast thereto, and a train of gears 40 41 42 and a pinion 61, 50fast to the shaft 60. On this driving-shaft 60 is a nest of gears,consisting of three gears 62, 63, and 64 of'difierent diameters, whichare keyed to the shaft, and three gears 65, 66, and 67 of differentdiameters, which are fast to a sleeve 68, rotatably mounted upon saidshaft. The six gears 52, 53, 54, 55, 56, and 57 shown in the figure arerotatably mounted upon the shaft50, and each meshes with one of thegears on the speed-gear driving- 60 shaft 60, as shown.

In the shaft 50 is a groove 51, in whicha key-bar 70 is movable, saidkey-bar having an outwardlyprojecting key 71, which is adapted toproject beyond the shaft and to enter a groove 59 in any one of thegears loosely mounted upon said shaft. This keybar hasatits otherend afinger 72, which enters a groove 73 in a sleeve 74, which may slide uponthe shaft. A spring 76, lying be- 70 neath the free end of this key-bar,forces it up into the position shown, when the key thereon will enterthe groove in the gears. Within the casing 80, which incloses thesenests of gears, are two gears 81 82 of difierent diameters, which areconnected together by the rotatable sleeve 83. One of these gears mesheswith a pinion 69, fast to the changegear driving-shaft 60, while theother meshes with one of the gears fast to the sleeve 68, which rotatesupon said shaft. The sliding sleeve 7 4, to which the key 7 O isattached, may be circumferentially grooved, thereby giving to the sleevethe characteristic of rack with which a pi-nion or other operatingdevice may 85 engage. By moving the sleeve 74 the key 70 may be causedto engage with any one-of the gears rotatably mounted upon the shaft 50,and it might be here stated that between each adjacent pair of thesegears is a washer 75, which prevents the simultaneous engagement of thekey with two gears.

The operation of the described construction is as follows: Thespeed-gear driving-shaft 60 is constantly rotated from the spindlethrough 5 the described train of gears, and consequently the back gears81 82 will be constantly rotated. If the key is engaging with either ofthe three gears at the left of the figure, then motion will betransmitted from the drivingshaft direct to the shaft 50 through thatone of the gears which is for the time being keyed thereto and that oneof the three gears keyed to the driving-shaft which is engaging with it.If the key is engaging with one of the three gears at the right in saidfigure, then the motion will be transmitted from the driving-shaft 60through the back gears 81 82 and gears meshing therewith to the sleeve68, upon which the three gears 65, 66, and 67 are connected, and thenceto that one of the gears on the feed-screw shaft with which the key isfor the time being engaging.

Having described our invention, we claim 1. In a lathe, the combinationof a changespeed-gearing driving-shaft, mechanism for rotating it, agear fast to said shaft, and other gears on said shaft, some of whichare fast to it and one, at least, of which is loose upon it, tworotatable connected gears of which one is in mesh with the gear looseupon the shaft and the other with the gear first referred to which isfast to said shaft, adriven shaft havinga longitudinal groove,gearsloosely mounted thereon in mesh with the fast and loose gears on thedriving-shaft substantially as described, each of the gears upon thedriven shaft having an internal keyway, a key movable in the groove insaid shaft whereby to connect said shaft with any gear thereon, a sleeveslidable upon said shaft and con nected with said key, and means formoving said sleeve lengthwise of the shaft.

2., In a lathe, the combination of a changespeed-gearing driving-shaft,mechanism for rotating it, a gear fast to said shaft, and other gears onsaid shaft some of which are fast to it and some of which are connectedtogether but loose upon it, two rotatable connected gears of which oneis in mesh with one of the gears loose upon the shaft and the other withthe gear first referred to which is fast to said shaft, a driven shafthaving a longitudinal groove, gears loosely mounted thereon in mesh withthe fast and loose gears on the driving-shaft substantially asdescribed, each of the gears upon the driven shaft having an internalkeyway, a key movable in the groove in said shaft whereby to connectsaid shaft with any gear thereon, a sleeve slidable upon the shaft andhaving external circumferential grooves and being connected with saidkey, a rock-shaft,and apinion secured thereto and engaging with saidgrooved sleeve.

3. In a lathe, the combination of a changespeed-gearing driving-shaft,mechanism for rotating it, a gear fast to said shaft and other gears onsaid shaft some of which are fast to it and some of which are connectedtogether but loose upon it, two rotatable connected gears of which oneis in mesh with one of the gears loose upon the shaft and the other withthe gear first referred to which is fast to said shaft, a drivenshaft'having a longitudinal groove, gears loosely mounted thereon inmesh with the fast and loose gears on the driving-shat t substantiallyas described, each of the gears upon the driven shaft having an internalkeyway, a key movable in the groot e in said shaft whereby to connectsaid shaft with any gear thereon, washers upon said shaft between saidgears whereby to prevent said key from engaging with two gears at thesame time.

In testimony whereof we hereunto affix our signatures in the presence oftwo witnesses.

CHARLES E. SEARCH. EDVJARD CHESHIRE.

Witnesses:

FRANK H. JOHNSTON, MATHIAS J. SOHMITZ.

